Beginning today, ATT customers who have an Xperia ion from Sony will be able to update their phone to Android 4.0 (Ice Cream Sandwich). Here's more info:

Android 4.0 makes your phone easier to use and more powerful than ever. The many new features include the new browser with improved page loading, tabbed browsing, offline reading and desktop mode. There are new lock/unlock features such as the ability to unlock directly to the camera, text messaging, phone dialer, home screen or use Face Unlock. You can also create home screen folders just by dragging one app icon onto another, and swipe away notifications with the new notifications bar.

For Xperia ion users, this Android 4.0 update will provide faster Mobile Hotspot and Wi-Fi speeds. Exchange Active Sync also received several upgrades thanks to Android 4.0. Several calendar and e-mail status indication enhancements were made to help you stay organized, while passcode security enhancements for unlocking Exchange Active Sync will give you more peace of mind. Up-to-date and improved visuals have been added to the street view in Maps, and when watching a YouTube clip you will also notice improved performance when rotating between portrait and landscape views.